The other form of circle equation is (x-a)2 + (y-b)2 = r2. a and b is the coordinate of the center and r is radius. So the equation is x2+(y-4)2=9. Change it to the general form is x2+y2-8y+7=0. So A=1, B=1, C=0, D=-8 and E=7.
Scientific notation:
5.0209003 x 10^4
Answer:
Option D, 
Step-by-step explanation:
<u>Step 1: Subtract 8 from both sides
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Answer: Option D, 
You need to subtract the bonus points form the final score: 91-4=87